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A187402
Number of (n+1)X(n+1) 0..2 arrays with diagonal zero and the i,j-th 2X2 subblock sum equal to the j,i-th 2X2 subblock sum
0
9, 141, 4743, 378999, 77470101, 43182942669, 69704886620367, 343603587128867631, 5351921330163734358189, 265547472520415711196418101
OFFSET
1,1
COMMENTS
Column 2 of A187408
EXAMPLE
Some solutions for 4X4
..0..0..2..1....0..2..0..0....0..2..0..1....0..2..0..2....0..2..0..2
..2..0..2..0....1..0..0..2....2..0..2..0....2..0..1..1....2..0..2..0
..0..2..0..2....0..1..0..1....2..0..0..0....0..1..0..1....0..2..0..1
..2..1..1..0....1..0..2..0....1..0..2..0....2..1..1..0....2..0..1..0
CROSSREFS
Sequence in context: A263966 A371365 A083084 * A363478 A303147 A317354
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 09 2011
STATUS
approved